| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
| * Copyright (c) 2013 Red Hat, Inc. |
| * All Rights Reserved. |
| */ |
| #ifndef __XFS_SHARED_H__ |
| #define __XFS_SHARED_H__ |
| |
| /* |
| * Definitions shared between kernel and userspace that don't fit into any other |
| * header file that is shared with userspace. |
| */ |
| struct xfs_ifork; |
| struct xfs_buf; |
| struct xfs_buf_ops; |
| struct xfs_mount; |
| struct xfs_trans; |
| struct xfs_inode; |
| |
| /* |
| * Buffer verifier operations are widely used, including userspace tools |
| */ |
| extern const struct xfs_buf_ops xfs_agf_buf_ops; |
| extern const struct xfs_buf_ops xfs_agi_buf_ops; |
| extern const struct xfs_buf_ops xfs_agf_buf_ops; |
| extern const struct xfs_buf_ops xfs_agfl_buf_ops; |
| extern const struct xfs_buf_ops xfs_bnobt_buf_ops; |
| extern const struct xfs_buf_ops xfs_cntbt_buf_ops; |
| extern const struct xfs_buf_ops xfs_rmapbt_buf_ops; |
| extern const struct xfs_buf_ops xfs_refcountbt_buf_ops; |
| extern const struct xfs_buf_ops xfs_attr3_leaf_buf_ops; |
| extern const struct xfs_buf_ops xfs_attr3_rmt_buf_ops; |
| extern const struct xfs_buf_ops xfs_bmbt_buf_ops; |
| extern const struct xfs_buf_ops xfs_da3_node_buf_ops; |
| extern const struct xfs_buf_ops xfs_dquot_buf_ops; |
| extern const struct xfs_buf_ops xfs_symlink_buf_ops; |
| extern const struct xfs_buf_ops xfs_agi_buf_ops; |
| extern const struct xfs_buf_ops xfs_inobt_buf_ops; |
| extern const struct xfs_buf_ops xfs_finobt_buf_ops; |
| extern const struct xfs_buf_ops xfs_inode_buf_ops; |
| extern const struct xfs_buf_ops xfs_inode_buf_ra_ops; |
| extern const struct xfs_buf_ops xfs_dquot_buf_ops; |
| extern const struct xfs_buf_ops xfs_dquot_buf_ra_ops; |
| extern const struct xfs_buf_ops xfs_sb_buf_ops; |
| extern const struct xfs_buf_ops xfs_sb_quiet_buf_ops; |
| extern const struct xfs_buf_ops xfs_symlink_buf_ops; |
| extern const struct xfs_buf_ops xfs_rtbuf_ops; |
| |
| /* log size calculation functions */ |
| int xfs_log_calc_unit_res(struct xfs_mount *mp, int unit_bytes); |
| int xfs_log_calc_minimum_size(struct xfs_mount *); |
| |
| struct xfs_trans_res; |
| void xfs_log_get_max_trans_res(struct xfs_mount *mp, |
| struct xfs_trans_res *max_resp); |
| |
| /* |
| * Values for t_flags. |
| */ |
| #define XFS_TRANS_DIRTY 0x01 /* something needs to be logged */ |
| #define XFS_TRANS_SB_DIRTY 0x02 /* superblock is modified */ |
| #define XFS_TRANS_PERM_LOG_RES 0x04 /* xact took a permanent log res */ |
| #define XFS_TRANS_SYNC 0x08 /* make commit synchronous */ |
| #define XFS_TRANS_DQ_DIRTY 0x10 /* at least one dquot in trx dirty */ |
| #define XFS_TRANS_RESERVE 0x20 /* OK to use reserved data blocks */ |
| #define XFS_TRANS_NO_WRITECOUNT 0x40 /* do not elevate SB writecount */ |
| /* |
| * LOWMODE is used by the allocator to activate the lowspace algorithm - when |
| * free space is running low the extent allocator may choose to allocate an |
| * extent from an AG without leaving sufficient space for a btree split when |
| * inserting the new extent. In this case the allocator will enable the |
| * lowspace algorithm which is supposed to allow further allocations (such as |
| * btree splits and newroots) to allocate from sequential AGs. In order to |
| * avoid locking AGs out of order the lowspace algorithm will start searching |
| * for free space from AG 0. If the correct transaction reservations have been |
| * made then this algorithm will eventually find all the space it needs. |
| */ |
| #define XFS_TRANS_LOWMODE 0x100 /* allocate in low space mode */ |
| |
| /* |
| * Field values for xfs_trans_mod_sb. |
| */ |
| #define XFS_TRANS_SB_ICOUNT 0x00000001 |
| #define XFS_TRANS_SB_IFREE 0x00000002 |
| #define XFS_TRANS_SB_FDBLOCKS 0x00000004 |
| #define XFS_TRANS_SB_RES_FDBLOCKS 0x00000008 |
| #define XFS_TRANS_SB_FREXTENTS 0x00000010 |
| #define XFS_TRANS_SB_RES_FREXTENTS 0x00000020 |
| #define XFS_TRANS_SB_DBLOCKS 0x00000040 |
| #define XFS_TRANS_SB_AGCOUNT 0x00000080 |
| #define XFS_TRANS_SB_IMAXPCT 0x00000100 |
| #define XFS_TRANS_SB_REXTSIZE 0x00000200 |
| #define XFS_TRANS_SB_RBMBLOCKS 0x00000400 |
| #define XFS_TRANS_SB_RBLOCKS 0x00000800 |
| #define XFS_TRANS_SB_REXTENTS 0x00001000 |
| #define XFS_TRANS_SB_REXTSLOG 0x00002000 |
| |
| /* |
| * Here we centralize the specification of XFS meta-data buffer reference count |
| * values. This determines how hard the buffer cache tries to hold onto the |
| * buffer. |
| */ |
| #define XFS_AGF_REF 4 |
| #define XFS_AGI_REF 4 |
| #define XFS_AGFL_REF 3 |
| #define XFS_INO_BTREE_REF 3 |
| #define XFS_ALLOC_BTREE_REF 2 |
| #define XFS_BMAP_BTREE_REF 2 |
| #define XFS_RMAP_BTREE_REF 2 |
| #define XFS_DIR_BTREE_REF 2 |
| #define XFS_INO_REF 2 |
| #define XFS_ATTR_BTREE_REF 1 |
| #define XFS_DQUOT_REF 1 |
| #define XFS_REFC_BTREE_REF 1 |
| #define XFS_SSB_REF 0 |
| |
| /* |
| * Flags for xfs_trans_ichgtime(). |
| */ |
| #define XFS_ICHGTIME_MOD 0x1 /* data fork modification timestamp */ |
| #define XFS_ICHGTIME_CHG 0x2 /* inode field change timestamp */ |
| #define XFS_ICHGTIME_CREATE 0x4 /* inode create timestamp */ |
| |
| |
| /* |
| * Symlink decoding/encoding functions |
| */ |
| int xfs_symlink_blocks(struct xfs_mount *mp, int pathlen); |
| int xfs_symlink_hdr_set(struct xfs_mount *mp, xfs_ino_t ino, uint32_t offset, |
| uint32_t size, struct xfs_buf *bp); |
| bool xfs_symlink_hdr_ok(xfs_ino_t ino, uint32_t offset, |
| uint32_t size, struct xfs_buf *bp); |
| void xfs_symlink_local_to_remote(struct xfs_trans *tp, struct xfs_buf *bp, |
| struct xfs_inode *ip, struct xfs_ifork *ifp); |
| xfs_failaddr_t xfs_symlink_shortform_verify(struct xfs_inode *ip); |
| |
| /* Computed inode geometry for the filesystem. */ |
| struct xfs_ino_geometry { |
| /* Maximum inode count in this filesystem. */ |
| uint64_t maxicount; |
| |
| /* Actual inode cluster buffer size, in bytes. */ |
| unsigned int inode_cluster_size; |
| |
| /* |
| * Desired inode cluster buffer size, in bytes. This value is not |
| * rounded up to at least one filesystem block, which is necessary for |
| * the sole purpose of validating sb_spino_align. Runtime code must |
| * only ever use inode_cluster_size. |
| */ |
| unsigned int inode_cluster_size_raw; |
| |
| /* Inode cluster sizes, adjusted to be at least 1 fsb. */ |
| unsigned int inodes_per_cluster; |
| unsigned int blocks_per_cluster; |
| |
| /* Inode cluster alignment. */ |
| unsigned int cluster_align; |
| unsigned int cluster_align_inodes; |
| unsigned int inoalign_mask; /* mask sb_inoalignmt if used */ |
| |
| unsigned int inobt_mxr[2]; /* max inobt btree records */ |
| unsigned int inobt_mnr[2]; /* min inobt btree records */ |
| unsigned int inobt_maxlevels; /* max inobt btree levels. */ |
| |
| /* Size of inode allocations under normal operation. */ |
| unsigned int ialloc_inos; |
| unsigned int ialloc_blks; |
| |
| /* Minimum inode blocks for a sparse allocation. */ |
| unsigned int ialloc_min_blks; |
| |
| /* stripe unit inode alignment */ |
| unsigned int ialloc_align; |
| |
| unsigned int agino_log; /* #bits for agino in inum */ |
| }; |
| |
| /* Keep iterating the data structure. */ |
| #define XFS_ITER_CONTINUE (0) |
| |
| /* Stop iterating the data structure. */ |
| #define XFS_ITER_ABORT (1) |
| |
| #endif /* __XFS_SHARED_H__ */ |
